I have a dull pain in my left chest. What caused it?

The dull pain under the left chest may be fork gas, also called acute chest rib pain. The cause of asthma is insufficient preparation or no preparation before strenuous activity. During strenuous activity, the muscles enter a state of tension, but the internal organs are too lazy to move immediately to meet the nutrition and oxygen needed for muscle activity, which makes the respiratory muscles tense and cramp, or when the oxygen demand of physical activity increases, the breathing is inappropriate, just speeding up the breathing frequency and shallow breathing will also make the respiratory muscles tense and cause cramps. It is also possible that you haven't participated in sports activities for a long time or that the weather is too cold and you sweat a lot. The content of sodium chloride in the body is too low, which will also cause side gas.

When qi is transferred, the respiratory muscles spasm, which stimulates the receptors in the respiratory muscles and produces pain. The main respiratory muscles of human body are intercostal muscle and diaphragm. When intercostal muscle spasms, there will be pain on both sides of the chest. When the diaphragm spasms, there will be pain under the left and right ribs. The method of stopping and preventing crosswind is:

1. Change shallow breathing, deepen breathing, exhale slowly and deeply, and exhale forcefully, so that you can inhale a lot of air, meet the needs of oxygen during exercise, relax breathing muscles and eliminate pain.

2. Adjust the breathing rhythm to match the breathing rhythm with the running frequency, so as to achieve two-step breathing or three-step breathing.

3. If the above methods can't eliminate the pain, you can take a deep breath, hold your breath, forcibly buckle the pain on both sides of the chest or under the ribs, and then take a deep breath slowly. Repeated several times can gradually relax the respiratory muscles and relieve spasms.

4. Before strenuous activity, prepare for the activity, so that the respiratory muscles can gradually adapt to the faster contraction frequency, so as not to cause convulsions.

Try to breathe through your nose during winter exercise. If you breathe through your mouth, open your mouth half way and let cold air enter your mouth through your teeth to prevent excessive stimulation.